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| author | Evandro Menezes <e.menezes@samsung.com> | 2018-03-05 17:02:47 +0000 |
|---|---|---|
| committer | Evandro Menezes <e.menezes@samsung.com> | 2018-03-05 17:02:47 +0000 |
| commit | cd855f70c5230a79d0b91cbbf6fb959572e67c50 (patch) | |
| tree | e760fa88bff1e24b060a280861294b0e6a18b161 /llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll | |
| parent | 3402e876ef1112d9d97d5e6f0f9dab9f05b168b0 (diff) | |
| download | bcm5719-llvm-cd855f70c5230a79d0b91cbbf6fb959572e67c50.tar.gz bcm5719-llvm-cd855f70c5230a79d0b91cbbf6fb959572e67c50.zip | |
[AArch64] Improve code generation of constant vectors
Use the whole gammut of constant immediates available to set up a vector.
Instead of using, for example, `mov w0, #0xffff; dup v0.4s, w0`, which
transfers between register files, use the more efficient `movi v0.4s, #-1`
instead. Not limited to just a few values, but any immediate value that can
be encoded by all the variants of `FMOV`, `MOVI`, `MVNI`, thus eliminating
the need to there be patterns to optimize special cases.
Differential revision: https://reviews.llvm.org/D42133
llvm-svn: 326718
Diffstat (limited to 'llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll')
| -rw-r--r-- | llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll b/llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll index c96e735dc81..23f9d906034 100644 --- a/llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll +++ b/llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll @@ -8,7 +8,7 @@ entry: ret void ; CHECK-LABEL: test0f - ; CHECK: movi.4s v[[TEMP:[0-9]+]], #0 + ; CHECK: movi.2d v[[TEMP:[0-9]+]], #0 ; CHECK: mov.s v[[TEMP]][0], v{{[0-9]+}}[0] ; CHECK: str q[[TEMP]], [x0] ; CHECK: ret @@ -24,9 +24,8 @@ entry: ret void ; CHECK-LABEL: test1f - ; CHECK: fmov s[[TEMP:[0-9]+]], #1.0000000 - ; CHECK: dup.4s v[[TEMP2:[0-9]+]], v[[TEMP]][0] - ; CHECK: mov.s v[[TEMP2]][0], v0[0] - ; CHECK: str q[[TEMP2]], [x0] + ; CHECK: fmov.4s v[[TEMP:[0-9]+]], #1.0 + ; CHECK: mov.s v[[TEMP]][0], v0[0] + ; CHECK: str q[[TEMP]], [x0] ; CHECK: ret } |
